Public water system · MT0004789
ActiveMt Air Natl Guard 120th Air Lift Wing
At a glance
Mt Air Natl Guard 120th Air Lift Wing (PWSID MT0004789) is an active non-transient non-community water system in Cascade County, Montana. It reports serving 350 people through 25 service connections. Its primary water source is purchased surface water, and EPA lists it as owned by a state government. EPA's Safe Drinking Water Act records list no violations for this system.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
350
Service connections
25
Primary source
SWP
Purchased surface water
System type
NTNCWS
Non-transient non-community water system
System record
How does Mt Air Natl Guard 120th Air Lift Wing compare with other water systems in Cascade County?
By EPA's size categories, Mt Air Natl Guard 120th Air Lift Wing is a very small system (500 people or fewer). Cascade County has 98 active public water systems. Its population served is about 64% below the county average of 985 people per system, and accounts for 0.4% of the 96,513 people reported by systems filed under the county. Across Montana, the 2,378 active systems average 489 people each. Nationally, the average active non-transient non-community water system reports serving 430 people, so Mt Air Natl Guard 120th Air Lift Wing is about 19% below that figure.
What does “non-transient non-community water system” mean?
A non-transient non-community water system regularly serves at least 25 of the same people for more than six months a year, but not where they live. Schools, factories, office buildings and hospitals with their own supply are typical examples. Montana has 319 active non-transient non-community water systems, 13% of the state's 2,378 active systems. Purchased surface water means the system buys surface water from another public water system rather than drawing its own. 212 Montana systems (8.9%) list purchased surface water as their primary source.
Who owns and regulates Mt Air Natl Guard 120th Air Lift Wing?
EPA lists Mt Air Natl Guard 120th Air Lift Wing as owned by a state government. The MT state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 10 of the 98 active systems in Cascade County (10%) are also owned by a state government.
Does Mt Air Natl Guard 120th Air Lift Wing have drinking water violations?
No SDWA violations on record.
EPA's SDWA violation and enforcement data (via EPA ECHO, updated quarterly) lists no violations for Mt Air Natl Guard 120th Air Lift Wing. For the latest compliance status, check EPA ECHO for current compliance history.
Mt Air Natl Guard 120th Air Lift Wing: frequently asked questions
Who runs Mt Air Natl Guard 120th Air Lift Wing?
Mt Air Natl Guard 120th Air Lift Wing (PWSID MT0004789) is a non-transient non-community water system owned by a state government. It is regulated by the MT state drinking water program.
How many people does Mt Air Natl Guard 120th Air Lift Wing serve?
Mt Air Natl Guard 120th Air Lift Wing reports serving 350 people through 25 service connections in Cascade County, Montana.
Where does Mt Air Natl Guard 120th Air Lift Wing get its water?
EPA SDWIS lists this system's primary water source as purchased surface water. Purchased surface water means the system buys surface water from another public water system rather than drawing its own.
Does Mt Air Natl Guard 120th Air Lift Wing have any drinking water violations?
EPA's Safe Drinking Water Act records list no violations for this system.
Is Mt Air Natl Guard 120th Air Lift Wing's water safe to drink?
AquaCensus shows EPA compliance records, not current water test results, so it cannot say whether the water is safe at a given moment. EPA's Safe Drinking Water Act records list no violations for this system. For current results, consult EPA ECHO, or the MT state drinking water program.
Where can I find Mt Air Natl Guard 120th Air Lift Wing's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Mt Air Natl Guard 120th Air Lift Wing is a non-transient non-community water system, so it is not required to publish one; like every public water system, it must notify the people it serves about violations under EPA's public notification rules.
Other water systems in Cascade County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Great Falls City of | Cascade | 60,000 | Community | Surface water |
| Malmstrom Air Force Base | Cascade | 8,850 | Community | Purchased surface water |
| Source Giant Springs Inc. | Cascade | 3,007 | Non-transient non-community | Groundwater |
| Montana Expo Park Cascade County | Cascade | 2,510 | Transient non-community | Purchased surface water |
| Sun Prairie Village County | Cascade | 1,800 | Community | Groundwater |
| University of Providence | Cascade | 1,472 | Non-transient non-community | Purchased surface water |
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About this data
Source: U.S. EPA Safe Drinking Water Information System (SDWIS) and SDWA violation records, via EPA ECHO, as published October 1, 2026 — AquaCensus refreshes it quarterly. See the methodology for how records are matched, cleaned and scored.
Cite as: AquaCensus, “Mt Air Natl Guard 120th Air Lift Wing, PWSID MT0004789, Montana”, https://aquacensus.com/water-systems/montana/mt-air-natl-guard-120th-air-lift-wing-mt0004789 (data as of October 1, 2026).